DANE O. Gudmundsson Internet-Draft Shinkuro Inc. Updates: 6698 (if approved) August 09, 2013 Intended status: Standards Track Expires: February 10, 2014 Harmonizing how applications specify DANE-like usage draft-dane-registry-acronym-00 Abstract Experience has show that people get confused using the three numeric fields the TLSA record. This document specifies descriptive acronyms for the three numeric fields in the TLSA records. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on February 10, 2014. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Gudmundsson Expires February 10, 2014 [Page 1] Internet-Draft Adding acronyms to DANE registries August 2013 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements notation . . . . . . . . . . . . . . . . . . 2 2. IANA considerations . . . . . . . . . . . . . . . . . . . . . 2 2.1. TLSA Certificate Usages . . . . . . . . . . . . . . . . . 2 2.2. TLSA Selectors . . . . . . . . . . . . . . . . . . . . . 3 2.3. TLSA Matching types . . . . . . . . . . . . . . . . . . . 3 3. Security considerations . . . . . . . . . . . . . . . . . . . 3 4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4 5. Normative References . . . . . . . . . . . . . . . . . . . . 4 Appendix A. Document history . . . . . . . . . . . . . . . . . . 4 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction During discussions on how to add DANE [RFC6698] technology to new protocols/services people repeatedly have got confused as what the numeric values stand for and even the order of the fields of a TLSA record. This document updates the IANA registry definition for TLSA record to add a column with acronym for each specified field, in order to reduce confusion. This document does not change the DANE protocol in any way. It is expected that DANE parser's in applications and DNS software MAY adopt parsing the acronyms for each field, installed base MAY NOT get updated. 1.1. Requirements notation The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. 2. IANA considerations This document applies to "DNS-Based Authentication of Named Entities (DANE) Parameters" located at "http://www.iana.org/assignments/dane- parameters/dane-parameters.xhtml". Each one of the Sub-registries will add a column with an acronym for that field. [RFC6698] and this document are both to be reference documents for the three sub-registries. 2.1. TLSA Certificate Usages +-------+----------+--------------------------------+-------------+ | Value | Acronym | Short Description | Reference | Gudmundsson Expires February 10, 2014 [Page 2] Internet-Draft Adding acronyms to DANE registries August 2013 +-------+----------+--------------------------------+-------------+ | 0 | PKIX-CA | CA constraint | [RFC6698] | | 1 | PKIX-EE | Service certificate constraint | [RFC6698] | | 2 | DANE-TA | Trust anchor assertion | [RFC6698] | | 3 | DANE-EE | Domain-issued certificate | [RFC6698] | | 4-254 | | Unassigned | | | 255 | PrivCert | Reserved for Private Use | [RFC6698] | +-------+----------+--------------------------------+-------------+ Table 1: TLSA Certificate Usages Note: should the short description be updated to be more expressive ? Other options suggested for 0: PKIX-TA 2.2. TLSA Selectors +-------+---------+--------------------------+-------------+ | Value | Acronym | Short Description | Reference | +-------+---------+--------------------------+-------------+ | 0 | Full | Full certificate | [RFC6698] | | 1 | Hash | SubjectPublicKeyInfo | [RFC6698] | | 2-254 | | Unassigned | | | 255 | PrivSel | Reserved for Private Use | [RFC6698] | +-------+---------+--------------------------+-------------+ Table 2: TLSA Selectors 2.3. TLSA Matching types +-------+----------+--------------------------+-------------+ | Value | Acronym | Short Description | Reference | +-------+----------+--------------------------+-------------+ | 0 | NoHash | No hash used | [RFC6698] | | 1 | SHA2-256 | 256 bit hash by SHA2 | [RFC6698] | | 2 | SHA2-512 | 512 bit hash by SHA2 | [RFC6698] | | 3-254 | | Unassigned | | | 255 | PrivHash | Reserved for Private Use | [RFC6698] | +-------+----------+--------------------------+-------------+ Table 3: TLSA Matching types 3. Security considerations None, this document only changes registry fields and does not change the behavior of any protocol. The hope is to reduce confusion and lead to better specification and operations. Gudmundsson Expires February 10, 2014 [Page 3] Internet-Draft Adding acronyms to DANE registries August 2013 4. Acknowledgements TBD 5. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC6698] Hoffman, P. and J. Schlyter, "The DNS-Based Authentication of Named Entities (DANE) Transport Layer Security (TLS) Protocol: TLSA", RFC 6698, August 2012. Appendix A. Document history [RFC Editor: Please remove this section before publication ] 00 Initial version Author's Address Olafur Gudmundsson Shinkuro Inc. 4922 Fairmont Av, Suite 250 Bethesda, MD 20814 USA Email: ogud@ogud.com Gudmundsson Expires February 10, 2014 [Page 4]